This 'Quick-Release Carabiner Strap', designed for smartphones, prevents users from damaging their smartphones by dropping. In addition, it can be used as a necklace according to the user's preference, or it can be worn on a pocket or belt using a clip on the back of the product, thus satisfying various consumer needs. The ring attached to the smart device is a carabiner, and it can be used as a necklace when it is attached to a strap part. It is possible to attach and detach the ring simply by pressing the button once, and the smart device can easily be worn on the pocket or belt by using the clip located on the back of the strap part.